// Scintilla source code edit control
/** @file LineMarker.cxx
 ** Defines the look of a line marker in the margin .
 **/
// Copyright 1998-2011 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

#include <string.h>

#include "Platform.h"

#include "Scintilla.h"
#include "XPM.h"
#include "LineMarker.h"

#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif

void LineMarker::RefreshColourPalette(Palette &pal, bool want) {
    pal.WantFind(fore, want);
    pal.WantFind(back, want);
    pal.WantFind(backSelected, want);
    if (pxpm) {
        pxpm->RefreshColourPalette(pal, want);
    }
}

void LineMarker::SetXPM(const char *textForm) {
    delete pxpm;
    pxpm = new XPM(textForm);
    markType = SC_MARK_PIXMAP;
}

void LineMarker::SetXPM(const char *const *linesForm) {
    delete pxpm;
    pxpm = new XPM(linesForm);
    markType = SC_MARK_PIXMAP;
}

static void DrawBox(Surface *surface, int centreX, int centreY, int armSize, ColourAllocated fore, ColourAllocated back) {
    PRectangle rc;
    rc.left = centreX - armSize;
    rc.top = centreY - armSize;
    rc.right = centreX + armSize + 1;
    rc.bottom = centreY + armSize + 1;
    surface->RectangleDraw(rc, back, fore);
}

static void DrawCircle(Surface *surface, int centreX, int centreY, int armSize, ColourAllocated fore, ColourAllocated back) {
    PRectangle rcCircle;
    rcCircle.left = centreX - armSize;
    rcCircle.top = centreY - armSize;
    rcCircle.right = centreX + armSize + 1;
    rcCircle.bottom = centreY + armSize + 1;
    surface->Ellipse(rcCircle, back, fore);
}

static void DrawPlus(Surface *surface, int centreX, int centreY, int armSize, ColourAllocated fore) {
    PRectangle rcV(centreX, centreY - armSize + 2, centreX + 1, centreY + armSize - 2 + 1);
    surface->FillRectangle(rcV, fore);
    PRectangle rcH(centreX - armSize + 2, centreY, centreX + armSize - 2 + 1, centreY+1);
    surface->FillRectangle(rcH, fore);
}

static void DrawMinus(Surface *surface, int centreX, int centreY, int armSize, ColourAllocated fore) {
    PRectangle rcH(centreX - armSize + 2, centreY, centreX + armSize - 2 + 1, centreY+1);
    surface->FillRectangle(rcH, fore);
}

void LineMarker::Draw(Surface *surface, PRectangle &rcWhole, Font &fontForCharacter, typeOfFold tFold) {
    ColourPair head = back;
    ColourPair body = back;
    ColourPair tail = back;

    switch (tFold) {
    case LineMarker::head :
        head = backSelected;
        tail = backSelected;
        if (markType == SC_MARK_VLINE)
            body = backSelected;
        break;
    case LineMarker::body :
        head = backSelected;
        body = backSelected;
        break;
    case LineMarker::tail :
        body = backSelected;
        tail = backSelected;
        break;
    default :
        // LineMarker::undefined
        break;
    }


    if ((markType == SC_MARK_PIXMAP) && (pxpm)) {
        pxpm->Draw(surface, rcWhole);
        return;
    }
    // Restrict most shapes a bit
    PRectangle rc = rcWhole;
    rc.top++;
    rc.bottom--;
    int minDim = Platform::Minimum(rc.Width(), rc.Height());
    minDim--;   // Ensure does not go beyond edge
    int centreX = (rc.right + rc.left) / 2;
    int centreY = (rc.bottom + rc.top) / 2;
    int dimOn2 = minDim / 2;
    int dimOn4 = minDim / 4;
    int blobSize = dimOn2-1;
    int armSize = dimOn2-2;
    if (rc.Width() > (rc.Height() * 2)) {
        // Wide column is line number so move to left to try to avoid overlapping number
        centreX = rc.left + dimOn2 + 1;
    }
    if (markType == SC_MARK_ROUNDRECT) {
        PRectangle rcRounded = rc;
        rcRounded.left = rc.left + 1;
        rcRounded.right = rc.right - 1;
        surface->RoundedRectangle(rcRounded, fore.allocated, back.allocated);
    } else if (markType == SC_MARK_CIRCLE) {
        PRectangle rcCircle;
        rcCircle.left = centreX - dimOn2;
        rcCircle.top = centreY - dimOn2;
        rcCircle.right = centreX + dimOn2;
        rcCircle.bottom = centreY + dimOn2;
        surface->Ellipse(rcCircle, fore.allocated, back.allocated);
    } else if (markType == SC_MARK_ARROW) {
        Point pts[] = {
            Point(centreX - dimOn4, centreY - dimOn2),
            Point(centreX - dimOn4, centreY + dimOn2),
            Point(centreX + dimOn2 - dimOn4, centreY),
        };
        surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
                        fore.allocated, back.allocated);

    } else if (markType == SC_MARK_ARROWDOWN) {
        Point pts[] = {
            Point(centreX - dimOn2, centreY - dimOn4),
            Point(centreX + dimOn2, centreY - dimOn4),
            Point(centreX, centreY + dimOn2 - dimOn4),
        };
        surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
                        fore.allocated, back.allocated);

    } else if (markType == SC_MARK_PLUS) {
        Point pts[] = {
            Point(centreX - armSize, centreY - 1),
            Point(centreX - 1, centreY - 1),
            Point(centreX - 1, centreY - armSize),
            Point(centreX + 1, centreY - armSize),
            Point(centreX + 1, centreY - 1),
            Point(centreX + armSize, centreY -1),
            Point(centreX + armSize, centreY +1),
            Point(centreX + 1, centreY + 1),
            Point(centreX + 1, centreY + armSize),
            Point(centreX - 1, centreY + armSize),
            Point(centreX - 1, centreY + 1),
            Point(centreX - armSize, centreY + 1),
        };
        surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
                        fore.allocated, back.allocated);

    } else if (markType == SC_MARK_MINUS) {
        Point pts[] = {
            Point(centreX - armSize, centreY - 1),
            Point(centreX + armSize, centreY -1),
            Point(centreX + armSize, centreY +1),
            Point(centreX - armSize, centreY + 1),
        };
        surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
                        fore.allocated, back.allocated);

    } else if (markType == SC_MARK_SMALLRECT) {
        PRectangle rcSmall;
        rcSmall.left = rc.left + 1;
        rcSmall.top = rc.top + 2;
        rcSmall.right = rc.right - 1;
        rcSmall.bottom = rc.bottom - 2;
        surface->RectangleDraw(rcSmall, fore.allocated, back.allocated);

    } else if (markType == SC_MARK_EMPTY || markType == SC_MARK_BACKGROUND ||
        markType == SC_MARK_UNDERLINE || markType == SC_MARK_AVAILABLE) {
        // An invisible marker so don't draw anything

    } else if (markType == SC_MARK_VLINE) {
        surface->PenColour(body.allocated);
        surface->MoveTo(centreX, rcWhole.top + blobSize - (rcWhole.bottom - rcWhole.top)/2);
        surface->LineTo(centreX, rcWhole.bottom);

    } else if (markType == SC_MARK_LCORNER) {
        surface->PenColour(tail.allocated);
        surface->MoveTo(centreX, rcWhole.top);
        surface->LineTo(centreX, rc.top + dimOn2);
        surface->LineTo(rc.right - 2, rc.top + dimOn2);

    } else if (markType == SC_MARK_TCORNER) {
        surface->PenColour(tail.allocated);
        surface->MoveTo(centreX, rc.top + dimOn2);
        surface->LineTo(rc.right - 2, rc.top + dimOn2);

        surface->PenColour(body.allocated);
        surface->MoveTo(centreX, rcWhole.top);
        surface->LineTo(centreX, rc.top + dimOn2 + 1);

        surface->PenColour(head.allocated);
        surface->LineTo(centreX, rcWhole.bottom);

    } else if (markType == SC_MARK_LCORNERCURVE) {
        surface->PenColour(tail.allocated);
        surface->MoveTo(centreX, rcWhole.top);
        surface->LineTo(centreX, rc.top + dimOn2-3);
        surface->LineTo(centreX+3, rc.top + dimOn2);
        surface->LineTo(rc.right - 1, rc.top + dimOn2);

    } else if (markType == SC_MARK_TCORNERCURVE) {
        surface->PenColour(tail.allocated);
        surface->MoveTo(centreX, rc.top + dimOn2-3);
        surface->LineTo(centreX+3, rc.top + dimOn2);
        surface->LineTo(rc.right - 1, rc.top + dimOn2);

        surface->PenColour(body.allocated);
        surface->MoveTo(centreX, rcWhole.top);
        surface->LineTo(centreX, rc.top + dimOn2-2);

        surface->PenColour(head.allocated);
        surface->LineTo(centreX, rcWhole.bottom);

    } else if (markType == SC_MARK_BOXPLUS) {
        DrawBox(surface, centreX, centreY, blobSize, fore.allocated, head.allocated);
        DrawPlus(surface, centreX, centreY, blobSize, tail.allocated);

    } else if (markType == SC_MARK_BOXPLUSCONNECTED) {
        surface->PenColour(body.allocated);
        surface->MoveTo(centreX, centreY + blobSize);
        surface->LineTo(centreX, rcWhole.bottom);

        surface->PenColour(body.allocated);
        surface->MoveTo(centreX, rcWhole.top);
        surface->LineTo(centreX, centreY - blobSize);

        DrawBox(surface, centreX, centreY, blobSize, fore.allocated, head.allocated);
        DrawPlus(surface, centreX, centreY, blobSize, tail.allocated);

        if (tFold == LineMarker::body) {
            surface->PenColour(tail.allocated);
            surface->MoveTo(centreX + 1, centreY + blobSize);
            surface->LineTo(centreX + blobSize + 1, centreY + blobSize);

            surface->MoveTo(centreX + blobSize, centreY + blobSize);
            surface->LineTo(centreX + blobSize, centreY - blobSize);

            surface->MoveTo(centreX + 1, centreY - blobSize);
            surface->LineTo(centreX + blobSize + 1, centreY - blobSize);
        }
    } else if (markType == SC_MARK_BOXMINUS) {
        DrawBox(surface, centreX, centreY, blobSize, fore.allocated, head.allocated);
        DrawMinus(surface, centreX, centreY, blobSize, tail.allocated);

        surface->PenColour(head.allocated);
        surface->MoveTo(centreX, centreY + blobSize);
        surface->LineTo(centreX, rcWhole.bottom);

    } else if (markType == SC_MARK_BOXMINUSCONNECTED) {
        DrawBox(surface, centreX, centreY, blobSize, fore.allocated, head.allocated);
        DrawMinus(surface, centreX, centreY, blobSize, tail.allocated);

        surface->PenColour(head.allocated);
        surface->MoveTo(centreX, centreY + blobSize);
        surface->LineTo(centreX, rcWhole.bottom);

        surface->PenColour(body.allocated);
        surface->MoveTo(centreX, rcWhole.top);
        surface->LineTo(centreX, centreY - blobSize);

        if (tFold == LineMarker::body) {
            surface->PenColour(tail.allocated);
            surface->MoveTo(centreX + 1, centreY + blobSize);
            surface->LineTo(centreX + blobSize + 1, centreY + blobSize);

            surface->MoveTo(centreX + blobSize, centreY + blobSize);
            surface->LineTo(centreX + blobSize, centreY - blobSize);

            surface->MoveTo(centreX + 1, centreY - blobSize);
            surface->LineTo(centreX + blobSize + 1, centreY - blobSize);
        }
    } else if (markType == SC_MARK_CIRCLEPLUS) {
        DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, head.allocated);
        DrawPlus(surface, centreX, centreY, blobSize, tail.allocated);

    } else if (markType == SC_MARK_CIRCLEPLUSCONNECTED) {
        surface->PenColour(body.allocated);
        surface->MoveTo(centreX, centreY + blobSize);
        surface->LineTo(centreX, rcWhole.bottom);

        surface->MoveTo(centreX, rcWhole.top);
        surface->LineTo(centreX, centreY - blobSize);

        DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, head.allocated);
        DrawPlus(surface, centreX, centreY, blobSize, tail.allocated);

    } else if (markType == SC_MARK_CIRCLEMINUS) {
        DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, head.allocated);
        DrawMinus(surface, centreX, centreY, blobSize, tail.allocated);

        surface->PenColour(head.allocated);
        surface->MoveTo(centreX, centreY + blobSize);
        surface->LineTo(centreX, rcWhole.bottom);

    } else if (markType == SC_MARK_CIRCLEMINUSCONNECTED) {
        DrawCircle(surface, centreX, centreY, blobSize, fore.allocated, head.allocated);
        DrawMinus(surface, centreX, centreY, blobSize, tail.allocated);

        surface->PenColour(head.allocated);
        surface->MoveTo(centreX, centreY + blobSize);
        surface->LineTo(centreX, rcWhole.bottom);

        surface->PenColour(body.allocated);
        surface->MoveTo(centreX, rcWhole.top);
        surface->LineTo(centreX, centreY - blobSize);

    } else if (markType >= SC_MARK_CHARACTER) {
        char character[1];
        character[0] = static_cast<char>(markType - SC_MARK_CHARACTER);
        int width = surface->WidthText(fontForCharacter, character, 1);
        rc.left += (rc.Width() - width) / 2;
        rc.right = rc.left + width;
        surface->DrawTextClipped(rc, fontForCharacter, rc.bottom - 2,
            character, 1, fore.allocated, back.allocated);

    } else if (markType == SC_MARK_DOTDOTDOT) {
        int right = centreX - 6;
        for (int b=0; b<3; b++) {
            PRectangle rcBlob(right, rc.bottom - 4, right + 2, rc.bottom-2);
            surface->FillRectangle(rcBlob, fore.allocated);
            right += 5;
        }
    } else if (markType == SC_MARK_ARROWS) {
        surface->PenColour(fore.allocated);
        int right = centreX - 2;
        for (int b=0; b<3; b++) {
            surface->MoveTo(right - 4, centreY - 4);
            surface->LineTo(right, centreY);
            surface->LineTo(right - 5, centreY + 5);
            right += 4;
        }
    } else if (markType == SC_MARK_SHORTARROW) {
        Point pts[] = {
            Point(centreX, centreY + dimOn2),
            Point(centreX + dimOn2, centreY),
            Point(centreX, centreY - dimOn2),
            Point(centreX, centreY - dimOn4),
            Point(centreX - dimOn4, centreY - dimOn4),
            Point(centreX - dimOn4, centreY + dimOn4),
            Point(centreX, centreY + dimOn4),
            Point(centreX, centreY + dimOn2),
        };
        surface->Polygon(pts, sizeof(pts) / sizeof(pts[0]),
                fore.allocated, back.allocated);
    } else if (markType == SC_MARK_LEFTRECT) {
        PRectangle rcLeft = rcWhole;
        rcLeft.right = rcLeft.left + 4;
        surface->FillRectangle(rcLeft, back.allocated);
    } else { // SC_MARK_FULLRECT
        surface->FillRectangle(rcWhole, back.allocated);
    }
}
